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The first person to suggest the existence of atoms was
8 electrons
atomic number
electrons, protons, and neutrons
isotopes
a proton
electrons
an atom
Democritus
Of the following particles, those not found in the nucleus of an atom are
8 electrons
atomic number
electrons, protons, and neutrons
isotopes
a proton
electrons
an atom
Democritus
Atoms of the same element that have different atomic masses are
8 electrons
atomic number
electrons, protons, and neutrons
isotopes
a proton
electrons
an atom
Democritus
All atoms of the same element have the same
8 electrons
atomic number
electrons, protons, and neutrons
isotopes
a proton
electrons
an atom
Democritus
Atoms are made up of
8 electrons
atomic number
electrons, protons, and neutrons
isotopes
a proton
electrons
an atom
Democritus
The second energy level of an atom can hold
8 electrons
atomic number
electrons, protons, and neutrons
isotopes
a proton
electrons
an atom
Democritus
The smallest part of an element that can be identified as that element is
8 electrons
atomic number
electrons, protons, and neutrons
isotopes
a proton
electrons
an atom
Democritus
A positively charged particle is
8 electrons
atomic number
electrons, protons, and neutrons
isotopes
a proton
electrons
an atom
Democritus
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